Glad to hear that S2 is on the mend!
I can't stand liners. Fiddly, have to be purchased, hard on plumbing and they scrunch up and aren't all that helpful at all. I have no problem with infant poopy dipes, and even with toddler poopy dipes, I just knock out what I can into the toilet, chuck it into the dry pail, and wash as is. H has super mushy poop compared to his sister ... so it's been muckier longer that I would like, but still fine. Some people use a spatula or a sprayer. Not us. I like a simple, uncomplicated process. Worst part might be the occasional laundered blueberry or bit of carrot left in the washing machine after. Nothing a quick wipe-out can't fix!